# Willow® vs SimDin

The clearest difference is in-app purchases: Willow® at none against SimDin's 3. Willow® also leads on iOS requirement (15.6 vs 26.2). SimDin's advantage is ads (none vs shown) and update cadence (daily vs monthly). On price and device support there is nothing between them.

Both are free to download. SimDin sells 3 in-app purchases, starting at $3.00 per month. Willow® asks for nothing beyond the download.

Willow® ships an update monthly, SimDin daily. The most recent releases landed on November 14, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Willow® | SimDin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2.8K ratings)](https://appshunter.io/ios/app/willow/id1579004074/reviews)** | — |
| Number of ratings | **2.8K** | — |
| Positive reviews | 13.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 103 MB | 8 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Willow Innovations, Inc.](https://appshunter.io/developer/1168207125) | [Reign Commons LLC](https://appshunter.io/developer/1845691753) |

## What reviewers say

### Willow®

[App page](https://appshunter.io/ios/app/willow/id1579004074)

Manage your Willow breast pump, track milk output, and access expert advice for pumping and postpartum care. Features include personalized pump control, session history, and AI-powered support.

**Highlights:** Control Willow pumps remotely, Track milk output and session history, Manage digital milk stash (SmartStash), Access expert articles and videos, AI-powered women's health chat, Book expert consultations

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to use
- 💡 Convenient for on-the-go pumping
- 👍 Comfortable and effective pumps

**What reviewers complain about**

- 🐛 Buggy app with connectivity issues
- 🔋 Poor battery life
- 👎 Lacking key features like pump history and volume tracking

**Reported bugs**

- App frequently disconnects from pumps
- Timer and session data not always accurate
- Pumps sometimes stop working mid-session

**Requested features**

- Add ability to log pumping volume and history
- Allow customization of pump timer
- Improve app responsiveness and reliability


### SimDin

[App page](https://appshunter.io/ios/app/simdin/id6759506379)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SimDin Starter | $3.00 | per month |
| SimDin Pro | $5.00 | per month |
| SimDin Monthly | $7.00 | per month |


## Frequently asked questions

### Is Willow® free?

Willow® is free to download, with no in-app purchases.

### Is SimDin free?

SimDin is free to download, with in-app purchases available.

### Do Willow® or SimDin have ads?

Willow® shows ads; SimDin does not.

### Which is updated more often, Willow® or SimDin?

Willow® ships an update monthly, and SimDin daily. Most recently, Willow® was updated on November 14, 2026 and SimDin on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*